Synonyms: Betahistine Dihydrochloride Imp. C (EP), Betahistine Imp. C (EP), N-Methyl-2-(pyridin-2-yl)-N-[2-(pyridin-2-yl)ethyl]ethanamine Trihydrochloride, Betahistine Dihydrochloride Imp. C (EP) as Trihydrochloride, Betahistine Dihydrochloride Impurity C as Trihydrochloride, Betahistine Impurity C as Trihydrochloride